Anyone running hedman 78050 headers?

I have these headers on my 68 cuda.we are in the process of putting it back together now.the po had a 440 with a different kmember in it.we got the car with a smallblock k member and a 318 already installed and running.the steering linkage was just slapped together loosely but it would turn and we only pushed the car by hand because of some other issues.the stock idler arm was shot so I got another at autozone which appeared to be the same except for the metal sleeve where the bolt goes through the k member.the sleeve in the stock one was all ofsett to one side and the new one is centered .the sleeve does not move in the idler arm and with it being centered it puts the steering linkage in contact hard with the header.ive tried to look at pix of others that may be offcenter like my original but cant seem to find one.even the pic of the moog one looks like it kinda centered.i was thinking of taking the autozone one and machining off the one side of the sleeve and then stacking extra washers on the other side.
any ideas?